In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called One-Pot Oxidative C-H Activation/Aza-Prins-Type Reaction of Tertiary Alkynylamines: A Counter Ion-Induced Iminium Ion-Alkyne Cyclization, published in 2021-02-05, which mentions a compound: 16400-32-1, Name is 1-Bromo-2-pentyne, Molecular C5H7Br, Application In Synthesis of 1-Bromo-2-pentyne.
Herein, the design and development of a new one-pot and metal-free oxidative C-H activation/aza-Prins type cyclization of alkynylamines was reported. The scope of this method was demonstrated by the preparation of ten new pyrido[2,1-a]isoquinolines I [R1 = R2 = H, OMe; R3 = H, Ph, 2-thienyl, etc.; R4 = H, Et; stereo = cis, trans] in moderate to high yields (38-92%). Furthermore, a mechanistic proposal for the alkyne aza-Prins cyclization was described based on DFT calculations
If you want to learn more about this compound(1-Bromo-2-pentyne)Application In Synthesis of 1-Bromo-2-pentyne, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(16400-32-1).
Reference:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics